﻿using System;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.InteropServices;
using System.ComponentModel.Design;
using Microsoft.Win32;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio.OLE.Interop;
using Microsoft.VisualStudio.Shell;
using EnvDTE100;
using sebagomez.VSProlog2010.Commands;
using EnvDTE;
using EnvDTE80;

namespace sebagomez.VSProlog2010
{
	/// <summary>
	/// This is the class that implements the package exposed by this assembly.
	///
	/// The minimum requirement for a class to be considered a valid package for Visual Studio
	/// is to implement the IVsPackage interface and register itself with the shell.
	/// This package uses the helper classes defined inside the Managed Package Framework (MPF)
	/// to do it: it derives from the Package class that provides the implementation of the 
	/// IVsPackage interface and uses the registration attributes defined in the framework to 
	/// register itself and its components with the shell.
	/// </summary>
	// This attribute tells the PkgDef creation utility (CreatePkgDef.exe) that this class is
	// a package.
	[PackageRegistration(UseManagedResourcesOnly = true)]
	// This attribute is used to register the informations needed to show the this package
	// in the Help/About dialog of Visual Studio.
	[InstalledProductRegistration("#110", "#112", "1.0", IconResourceID = 400)]
	// This attribute is needed to let the shell know that this package exposes some menus.
	[ProvideMenuResource("Menus.ctmenu", 1)]
	[Guid(GuidList.guidVSProlog2010PkgString)]
	public sealed class VSProlog2010Package : Package
	{
		/// <summary>
		/// Default constructor of the package.
		/// Inside this method you can place any initialization code that does not require 
		/// any Visual Studio service because at this point the package object is created but 
		/// not sited yet inside Visual Studio environment. The place to do all the other 
		/// initialization is the Initialize method.
		/// </summary>
		public VSProlog2010Package()
		{
			Trace.WriteLine(string.Format(CultureInfo.CurrentCulture, "Entering constructor for: {0}", this.ToString()));
		}



		/////////////////////////////////////////////////////////////////////////////
		// Overriden Package Implementation
		#region Package Members

		/// <summary>
		/// Initialization of the package; this method is called right after the package is sited, so this is the place
		/// where you can put all the initilaization code that rely on services provided by VisualStudio.
		/// </summary>
		protected override void Initialize()
		{
			Trace.WriteLine(string.Format(CultureInfo.CurrentCulture, "Entering Initialize() of: {0}", this.ToString()));
			base.Initialize();

			// Add our command handlers for menu (commands must exist in the .vsct file)
			//OleMenuCommandService mcs = GetService(typeof(IMenuCommandService)) as OleMenuCommandService;
			//if (null != mcs)
			//{
			//    // Create the command for the menu item.
			//    CommandID menuCommandID = new CommandID(GuidList.guidVSProlog2010CmdSet, (int)PkgCmdIDList.cmdidDefinition);
			//    MenuCommand menuItem = new MenuCommand(MenuItemCallback, menuCommandID);
			//    menuItem.CommandChanged += new EventHandler(menuItem_CommandChanged);
			//    mcs.AddCommand(menuItem);
			//}
		}

		void menuItem_CommandChanged(object sender, EventArgs e)
		{
			System.Windows.Forms.MessageBox.Show("It changed");
		}
		#endregion

		/// <summary>
		/// This function is the callback used to execute a command when the a menu item is clicked.
		/// See the Initialize method to see how the menu item is associated to this function using
		/// the OleMenuCommandService service and the MenuCommand class.
		/// </summary>
		private void MenuItemCallback(object sender, EventArgs e)
		{
			DTE dte = GetService(typeof(SDTE)) as DTE;

			if (dte == null || dte.ActiveDocument == null || dte.ActiveDocument.Object() == null || !(dte.ActiveDocument.Object() is TextDocument))
				return;

			string pattern = ((TextDocument)dte.ActiveDocument.Object()).Selection.Text;

			if (string.IsNullOrWhiteSpace(pattern))
			{
				System.Windows.Forms.MessageBox.Show("You must select (double click) the predicate");
				return;
			}

			dte.Find.Action = vsFindAction.vsFindActionFindAll;
			dte.Find.Backwards = true;
			dte.Find.FilesOfType = "*.ari";
			dte.Find.FindWhat = "^" + pattern + @".*\:-"; //^pattern.*\:-
			dte.Find.KeepModifiedDocumentsOpen = true;
			dte.Find.MatchCase = false;
			dte.Find.MatchInHiddenText = true;
			dte.Find.MatchWholeWord = false;
			dte.Find.PatternSyntax = vsFindPatternSyntax.vsFindPatternSyntaxRegExpr;
			dte.Find.ResultsLocation = vsFindResultsLocation.vsFindResults1;
			dte.Find.SearchSubfolders = true;
			dte.Find.Target = vsFindTarget.vsFindTargetCurrentDocument;
			dte.Find.Execute();
		}

	}
}
